The usual way to fit the 1/4lights, whether opening or fixed, is to build them up off the van and fit them whole from the top, after first fitting the outer scraper (but not the trim clip near the 1/4light or it gets in the way).
Then the inner scraper starting at the rear, which is nigh on impossible to get tucked behind the 1/4light upright!
You need to push the wind up glass to the outside to get the 1/4light in. It's very tight, but start it further back and you'll be able to get the lower fixing bracket through' then slide it forwards and tilt into position. If you just painted the door you'll need 3 hands and independent eyeballs to avoid scatching the paint.
Good tip up there ^ to pre-bend the furry strip round the glass prior to fitting.
Then the inner scraper starting at the rear, which is nigh on impossible to get tucked behind the 1/4light upright!
You need to push the wind up glass to the outside to get the 1/4light in. It's very tight, but start it further back and you'll be able to get the lower fixing bracket through' then slide it forwards and tilt into position. If you just painted the door you'll need 3 hands and independent eyeballs to avoid scatching the paint.
Good tip up there ^ to pre-bend the furry strip round the glass prior to fitting.